Ice Worlds at the Royal Society Summer Science Exhibition

At
huge distances from the Sun, the moons of the outer planets and dwarf planets,
such as Pluto, reside in a bizarre world of extreme cold where water behaves
like a solid rock. However, despite the biting cold, many of these worlds are
alive with activity, such as the erupting geysers on the surface of Neptune’s moon Triton.

Visitors
to the exhibit will be able to experience reconstructions of the often rugged icy surfaces of these worlds, which lie hundreds of
millions of miles away from our own planet. Scientists from UCL, the University of Kent, Queen’s University
Belfast, and Imperial College London, will be on hand to explain the
spectacular images, scale models and 3D images that have been captured during
their research into the edges of our solar system.

Lead
exhibitor Dr Geraint Jones, from UCL’s Mullard Space Science Laboratory, said:
“We hope to demonstrate to the public how exciting these ice worlds are. They
have everything: towering cliffs of ice, active geysers, complex atmospheres,
and hidden oceans of water.”

He
added: “A few icy moons even have oceans of water hidden beneath their outer
crust. There’s an extremely remote possibility that these hidden seas could
even be home to very primitive life forms.”

We hope to demonstrate to the public how exciting these ice worlds are. They have everything: towering cliffs of ice, active geysers, complex atmospheres, and hidden oceans of water.

Dr Geraint Jones, UCL Mullard Space Science Laboratory

Among
other scale models, a highlight of the exhibit is a reconstruction of the
active south polar region of Enceladus. Discovered by William Herschel in 1789
from his home in Slough,
this 500km-wide moon of Saturn was recently revealed by the Cassini-Huygens
mission to be active today. Using data from the mission, detailed maps of the
moon have been used to build an accurate reconstruction of its tortured icy
surface.

The
exhibit also features a 3D movie of the view that the European Space Agency’s
recently-selected JUICE mission will have of Jupiter’s large moon Ganymede.

The
Ice Worlds team comprises a wealth of expertise from the four participating
universities:

Dr Geraint Jones
and Dr Chris Arridge, both from UCL’s Mullard Space Science Laboratory,
work on the interaction between many icy moons and the complex charged
particle soup that surrounds them. Dr Pete Grindrod, from UCL’s Department
of Earth Sciences, is an expert on the geology of these icy worlds.

Dr Stephen Lowry
from the University of Kent,
and Dr Pedro Lacerda of Queen’s University Belfast use large telescopes to
learn about the physical properties of comets and distant trans-Neptunian
worlds, and what they are made of.

Dr Ingo
Mueller-Wodarg and Dr Marina Galand from Imperial College London study the
fascinating atmospheres of moons such as Titan through the combination of
spacecraft data and complex simulations.

The
scientists will be on hand at the exhibition which runs from 2 July to 7 July,
to talk visitors through their research which ranges from how we determine
dwarf planets’ shapes from the way their brightness varies, to building
instruments to sample the tenuous charged gases that surround the moons of the
outer planets.

The exhibit is supported by the Science and
Technology Facilities Council and the Royal Astronomical Society, as well as by
UCL, the University of Kent, Queen’s University Belfast, and Imperial
College London.

Image: Saturn's icy moon
Hyperion, famous for its deeply cratered surface, which gives the body a sponge-like appearance. Hyperion's orbit and rotation are perturbed by the much more massive Titan. Credit:
"NASA/JPL/Space Science Institute"